Eco-Friendly Synthesis of 3D Disordered Carbon Materials for High-Performance Dual Carbon Na-Ion Capacitors
An eco-friendly and sustainable salt-templating approach was proposed for the production of anode materials with a 3D sponge-like structure for sodium-ion capacitors using gluconic acid as carbon precursor and sodium carbonate as water-removable template. The optimized carbon material combined porous thin walls that provided short diffusional paths, a highly disordered microstructure with dilated interlayer spacing, and a large oxygen content, all of which facilitated Na ion transport and provided plenty of active sites for Na adsorption. This material provided a capacity of 314 mAh g-1 at 0.1 A g-1 and 130 mAh g-1 at 10 A g-1 . When combined with a 3D highly porous carbon cathode (SBET ≈2300 m2 g-1 ) synthesized from the same precursor, the Na-ion capacitor showed high specific energy/power, that is 110 Wh kg-1 at low power and still 71 Wh kg-1 at approximately 26 kW kg-1 , and a good capacity retention of 70 % over 10000 cycles.
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Wiley-VCH
2022-10-10
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| Subjects: | carbon, Energy storage, hybrid ion capacitor, porous carbon, sodium, |
| Online Access: | http://hdl.handle.net/10261/281315 https://api.elsevier.com/content/abstract/scopus_id/85135890448 |
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